Machine for making metal tubing.



S. JACKSON. MACHINE FOR MAKING METAL TUBING.

0N FILED JUNE PPLIOATI Patented Apr. 5, 1910.

3 SHEETS-SHEET 1.

S. J AOKSON MACHINE FOR. MAKING METAL TUBING.

\ APPLICATION FILED JUNE 27, 1907. 7 953,955. Patented Apr.5, 1910.

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UNITED STATES PATENT OFFICE.

MACHINE FOR MAKING METAL TUBING.

Specification of Letters Patent. Application filed June 27, 1907.

Patented Apr. 5, 1910. Serial No. 381.021.

To all whom it may concern:

Be it known that .I, SAMUEL'JAGKSON, a citizen of the United States, theborough of Brooklyn, in the city of New York, county of Kings, and Stateof New and residing in j York, have invented a new and useful Imlprovement in Machines for Making Metal Tubing, of which the following isa specification, like numerals referring to like parts throughout.

The object of my invention is to provide a 1 machine of this characterwhich is especially adapted to the making of brass-tubing for bedsteads;to make tubing for this purpose thatwill have the appearance andstrength of thick brass tubing yet which will require the use ofcomparatively little brass in its production; and which will also bevery light in weight. In carrying out this idea the tubing is made witha steel inner shell and a thin brass outer shell secured together.

The details of my invention are shown in the accompanying drawings, inwhich Figure 1 is a vertical longitudinal section of the machine withsome of the finishing parts removed; Fig. 2, a side view of a partthereof on a larger scale; Fig. 3, a plan view of the same; Fig. 4 anend view of the same; Fig. 5, a detail end view of the folder-blocks;Fig. 6 a full -size perspective View of one of the folder-blocks; Figs.7 and 8, views of the tube at different stages in its production; Fig.9, a detail view of the horizontal guiderollers; and Fig. 10, a detailview of one of the vertical guide-rollers.

The machine consists of a table 1 which supports the bending and feedingrolls 2, 2 and 3, 3; and the funnel-like shaper 4. The rolls are drivenby any suitable mechanism (not shown) in the direction of the arrows.Theserolls are supported in suitable'jourual boxes shown in dottedlines, the upper ones of which are made adjustable by providing theset-screws 5. It will be notedthat the rolls 2, 2, the upper one ofwhich is shown entire, are made with their peripheries rounded intocomplementary curves with the upper one convex in character and thelower one concave. The result of the passage of the metal strips,hereinafter referred to, between these is obviously to give the latter aslight' curvature. The two rolls, 3, 3, have their peripheries concavedand similar to the lower roll of 2, 2, but of more pronounced curvatureso as to further add to the curvature of the metal strips as they leavethe vvided with the upstanding shaper 4. Beyond these rolls there arestill others of the same general character doslgned to more perfectlyform the thus far partlally shaped tubing, but as this part of thedevice is of a type known before, and since I do not wish to claim it asany part of my invention, in order to simplify the drawmgs anddescription I have omitted it a ltogether.

The part of the device in which my improvements reside is located inadvance of all of the rollers above-described. This 0011- sists in anauxiliary table 6 clamped by means of the adjustable angle irons 7 tothe main table 1 and supported for adjustment therefrom by the set screw8 and supported at its other end from the floor by means of thescrew-jack 9. This auxiliary table (5 has a bed-plate 10, attached to itby the screws 11. The bed plate 10 has made intogral therewith theVertical frame 12, prolugs 13, carrying adjust the horithe screws 14designed to folder-blocks l5,

zontal portions of the two which are held in by the screws 16. passingthrough the slots 17.- The screws 16 beside passing through the slots 17in the folder-blocks, also serve 'to clamp down to the latter theguide-bar 18, which is provided with a rounded underside at 19, toassist in the passage of the,

upper strip of metal through the blocks and to maintain-it in contactwith the lower strip during said passage.

It will be noted that each folder-block consists of a thick part 20,having the above mentioned vertical slots 17 and .the thin operative 22on its upper side which is separated from the-top of the thick portion20 by the vertical wall '23, and the under-cut curved surface 24soshaped that the upper surface of said curve is near to the plane surface22 at the outlet or right-hand end of the block while the depth of thechannel produced by the curve also becomes less from one side of theblock to the other in correspondence. with the lessening height of thechannel.

In advance of the folder-blocks 15 are located two horizontalguide-rolls 25, journaled in the boxes 26, the upper ones of which areadjustable through the agency of the said screws 27'. These rolls, 25,are provided, at one end, with similar spur gears, 28, meshing into oneanother. The axis of the lower horizontal guide-roll is their adjustedpositions part 21, having a plane surface llO ' 2, 2. ,After saidengagement guide plates 30' are extended beyond the gears 28, and is suared at 29, so as toper mit the attachment t ereto of a crank (notshown) when starting'the machine, as described below. As shown in Fig.9, the horizontal ide-rolls are constructed with annular anges 30, thoseon the upper roller being closer together than those on the lower one.Two adjustable situated in frontof these rolls; between them and thenceto the rolls, 25, is fed the upper metal plate, 33, for which they serveas a guide, Behind the folder-blocks 15 are located two verticalguide-rolls 31, each of which is adjustably supported at the side of theauxiliary table (3 by the double-cared angle irons 32.

The operation of the machine is as follows: A narrow strip ofstrengthening'metal preferably steel, superimposed above a widerfinishing strip, such as brass, is fed between the horizontalguide-rolls 25, which are turned by a crank to start the feeding of. thestrips until they have entered the machine far enough to beengalged bythe continuously rotated fe'ed an bending-rolls, I has taken place, thecrank is removed, and the making of the. tubing from the sheet-metal iscarried on continuously until the strips are exhausted. During theprocess the upper stri is centered over the lower one by, the horizontalguide-rolls and while the two are held in intimate contact they are fedinto the folder-blocks, where the free edge of the lower strip is foldedover the {up er strengthening strip as shown at 35, in Big.

- 7. The two strips thus secured togetherafter passing through thevertical guide rolls 31, are drawn into the bendin -rolls 2, where aninitial curve is given to t e double strip. Then the bent strip passesthrough the funnel-like shaper which brings the stri s more nearly tothedesired curvature. A urther shaping is given the strip by its passagethrough the rolls 3, 3. From this point the StIlpdS passed throughseveral devices not material to my invention for making it into aperfectly cylindrical tube as shown in Fig. 8. Subsequently, the twofree edges of this tube are brazed together by any approved method,making the periphery entirely continuous.

I do not wish myself to be limited by the above described details, butconsider that 'of the narrower strip,

various changes may be made in the mi nor departing from theprincipledetails without of my discovery.

What I claim is:

1. In a machine for making metal tublng, the combination of flangedrolls adapted to feed and guide two strips of inetal one of which issuperimposed upon the other of different widths, and a device for foldmgthe edges of the wider strip over the edges the rolls being arranged inadvance of the folding device, substantially as"'described.

'2. In a machine for making metal tubin the combination of flangedhorizontal gui e and feed rolls, a folding device, and means for bendingthe folded metal into tubing, I,

the rolls being arranged in advance of the folding device, substantiallyas described.

In a machine for making metal tubin guide plates and flanged horizontalui e and feed rolls in advance of and in com ination with means'forbending the folded metal into tubing, substantially as described. 4.Ina device of the character described, a folder block comprising twoopposite convergent and reentrant channels of height decreasing from oneend of the channel to the other, said block being divided intermediateof said channels into two parts each 0 which is provided with means forattachment to a bed plate and adjustment thereon so as to vary the"distance between the channels, substantially as and for the purposedescribed.

5. In a device of the character'described,

a folder block comprising two opposite equally convergent and reentrantchannels of hei ht decreasing continuously from one end 0 the channel tothe other, said block being divided intermediate of said channels, intotwo parts each of which is pro vided with means for attachment to a bedplate and adjustment thereon so as to vary the distance between thechannels, substantially as and for the purpose described.

In witness whereof I have hereunto set my. hand in the presence of twosubscribing witnesses, this 17th day of June, 1907.

SAMUEL JACKSON.

